Photographic-plate holder.



PATENTED OCT. 6, 1 903.'

.................................. @TL: 4WD m\\$ m4 w s G. A. HAGNER.

PHOTOGRAPHIC PLATE HOLDER.

APPLIOATION FILED JULY 1, 1902.

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10 MODEL.

UN TED STATES Patented October 6, 1903.

" Fries.

PATEN PHOT OGFtAP HIC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent N 0. 740,850, dated October6, 1903.

Application filed July 1, 1902. Serial No. 113,986. (No model.)

To all whom it may concern.-

Be itknown that I, GUSTAVE A. HAGNER, a citizen of the United States,residing at Meriden, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inPhotographic- Plate Holders; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being bad to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to improvements in photographic-plate holders;and it consists in certain novel features of construction andarrangement of parts, which will be more fully hereinafter described inthe following specification, and pointed out in the claims.

The object of this invention is to produce a cheap, durable, andefficient plate-holder for photographic purposes from which the platecan be more readily and easily ejected than from those now in use, and Iattain these objects by means of the mechanism illustrated in theaccompanying drawings, in which- Figure l is a viewin elevation of aform of holder well calculated to illustrate and carry out the spirit ofmy invention. Fig. 2 is a view of a transverse section, taken on theline X X of Fig. 1. Fig. 3 is a detached view of the ejector-rod withone of the retaining and ejecting jaws or dogs mounted thereon. Fig. 4is an end View of the portion shown in the preceding figure.

Similar letters and figures refer to similar parts throughout the entireviews.

A represents a frame of usual construction with the exception that oneof the inner edges of each of its side pieces is beveled or slanted oif,as shown at 1 in Figs. 1 and 2.

2 represents the shaft or spindle mounted in the frame A and is securedin place in any well known and approved manner. The

outer end of the shaft or spindle 2 is bent at an angle, as shown at 8,to form a handle or lever by which to turn it when manipulating thedevice.

4 is a spring secured to the inner edge of the frame A and is located inapproximately the same plane as the shaft or spindle 2.

5 5 are jaws or dogs mounted upon the shaft or spindle 2 and are formedapproximately U shape, as shown in Fig. 2. The

jaws or dogs may consist of strips secured to partial revolution of theshaft or spindle 2. v

The operation of the device is as follows: With the jaws or dogs intheir retaining position one edge of the plate 6 is pressed against thespring 4 until the said spring is sufficiently depressed to admit ofpassing the opposite edge of the said plate over into the jaws or dogs 55, when it will be retained in position by reason of the spring-pressurebe ing exerted directly over the center of the shaft or spindle 2. Torelease and eject the plate, it is simply necessary to turn the handle 3in the proper direction, when the edge of the plate will be thrownforward, and the spring then acts to eject the plate from the holder ina manner which will be readily understood.

It is obvious that numerous similarconstructions may be made withoutdeparting from the spirit of my invention. Therefore I do not wish to beunderstood as limiting myself to the exact construction shown, butdesire the liberty to enjoy the full scope of my invention and toconstruct the same in any manner which I may deem desirable.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A photographic-plate holder, comprising a frame, a rotatable shaft,or spindle, pro vided with one or more jaws, or dogs, and mountedtherein, and a spring arranged within said frame, and adapted to act inconjunction with said jaws, ordogs to either retain within, or eject aplate from said frame, substantially as shown and described.

2. In a photographic-plate holder, a frame, a rotatable shaft, jawscarried by the shaft and a spring coacting with the jaws as and for theedge of a plate when turned inwardly, as the purpose described. and forthe purpose described. 10

3. A photographic-p1ate holder comprising In testimony whereof I affixmy signature a frame and in combination a shaft journaled in presence oftwo Witnesses. 5 along the inner edge of one side of the frame, IGUSTAVE A. HAGNER.

1 Witnesses:

jaws carried by the shaft and a spring on the T. M. BYXBEE,

inner edge of the side of the frame opposite the shaft, the dogs beingarranged to embrace 1 JOHN M. BREWER.

